CN101676788B

CN101676788B - Optical apparatus

Info

Publication number: CN101676788B
Application number: CN2009101729906A
Authority: CN
Inventors: 铃木伸嘉
Original assignee: Canon Inc
Current assignee: Canon Inc
Priority date: 2008-09-16
Filing date: 2009-09-15
Publication date: 2011-12-07
Anticipated expiration: 2029-09-15
Also published as: JP2010072062A; JP5202202B2; US7949243B2; CN101676788A; US20100067889A1

Abstract

An optical apparatus includes an anti-shake lens L3 shifting with respect to an optical axis AXL of an optical system, a movable lens L4 moving along the optical axis, a light intensity controlling member 5 controlling light intensity, first and second actuators including magnets 33a and 33b and coils 34a and 34b, respectively, which shifts the anti-shake lens to directions different from each other, a third actuator including a magnet 63 and a coil 54 which moves the movable lens, a fourth actuator 51 which operates the light intensity controlling member, and a barrel member 7 which contains the anti-shake lens, the movable lens, the light intensity controlling member, and the first to the fourth actuators. The first to the fourth actuators are disposed inside the barrel member so as not to overlap with one another when viewed in an optical axis direction.

Description

Optical device

Technical field

The present invention relates to a kind of optical device with the anti-lens that quiver, moving lens and driving as the actuator of each fader control member such as aperture and shutter.

Background technology

As the actuator that optical devices such as picture pick-up device or interchangeable lens are provided with moving lens and this moving lens is moved, this moving lens can move along the optical axis of optical system, is used to become multiplying power (variable magnification) or focal adjustments.In order to reduce by the moving image vibration that causes of so-called hand tremor, this optical device is provided with anti-quiver mechanism and two actuators usually, be somebody's turn to do the anti-mechanism of quivering and be made of the anti-lens that quiver that can be shifted with respect to the optical axis of optical system, this actuator makes the anti-lens that quiver along pitch orientation (pitch direction) and yaw direction (yaw direction) displacement.

As the actuator that is used to make the anti-lens displacement of quivering, usually, use the actuator that constitutes by coil and magnet.On the other hand, as the actuator that is used to moving lens is moved, the linear actuators that can use the rotation motor or constitute by coil and magnet (voice coil motor).

In addition, this optical device is provided with the actuator as each side in fader control members such as ND wave filter (neutral filter, neutral density filter) and shutter and driving N D wave filter and the shutter.

TOHKEMY 2003-295249 communique discloses a kind of optical device, in this optical device, the lens movement actuator that is used for moving lens is moved is disposed in the anti-position of actuator with respect to the optical axis position symmetry of quivering with two anti-actuators that quiver that are used to make the anti-lens displacement of quivering.This configuration can make optical device radially reach miniaturization on the optical axis direction.In the disclosed optical device of TOHKEMY 2003-295249 communique, diaphragm actuator and ND actuator are disposed in the outside of tube.

On the other hand, when camera lens concertina type optical device is provided with movement actuator, anti-when quivering actuator and fader control member actuator, all these actuators all need to be disposed in the inside of tube.In this case, for example, prevent quivering actuator and fader control member actuator can be arranged to when overlapping each other when optical axis direction is observed and closely arranging on optical axis direction.

Yet, in the structure of the disclosed anti-actuator that quivers of TOHKEMY 2003-295249 communique, emit most of magnetic force of magnet along optical axis direction.Therefore, when adopting aforesaid configuration, anti-quiver actuator and the magnetic interference each other of fader control member actuator, and may influence separately action.

Summary of the invention

The invention provides the optical device that a kind of magnetic that can alleviate between the actuator is interfered.

Optical device as one aspect of the present invention comprises: the anti-lens that quiver, and it can be with respect to the optical axis displacement of optical system; Moving lens, it can move along optical axis; The fader control member, it is configured to control the light quantity by optical system; First and second actuators, each side in this first and second actuator includes magnet and coil, and this first and second actuator is constructed such that to be prevented quivering lens at the different directions from each other superior displacement; The 3rd actuator, it comprises magnet and coil, and is constructed such that moving lens moves; The 4th actuator, it is configured to operate the light quantity control member; And barrel member, it holds anti-quiver lens, moving lens, fader control member and first to fourth actuator.When optical axis direction is observed, first to fourth actuator is disposed in the inside of barrel member in the mode that does not overlap each other.

To the explanation of exemplary embodiment, it is obvious that further feature of the present invention and aspect will become by with reference to the accompanying drawings.

Description of drawings

Fig. 1 is the sectional view that illustrates as the structure of the lens barrel (retracted position) of the picture pick-up device of an embodiment of the invention.

Fig. 2 is the last cut-open view of the structure of lens barrel (retracted position) that this embodiment is shown.

Fig. 3 is the sectional view that the structure of lens barrel (WIDE position) is shown.

Fig. 4 is the last cut-open view that the structure of lens barrel (WIDE position) is shown.

Fig. 5 is the sectional view that the structure of lens barrel (TELE position) is shown.

Fig. 6 is the last cut-open view that the structure of lens barrel (TELE position) is shown.

Fig. 7 is the rear view of the aperture unit in the lens barrel.

Fig. 8 is the front elevation of the aperture unit in the lens barrel.

Fig. 9 is the exploded perspective view that the structure of the focusing driving mechanism in the lens barrel is shown.

Figure 10 is the stereographic map that the structure of a part that focuses on driving mechanism is shown.

Figure 11 is the exploded perspective view that the structure of the anti-unit that quivers in the lens barrel is shown.

Figure 12 is the stereographic map that the assembling completion status of the anti-unit that quivers is shown.

Figure 13 is the front elevation that the configuration that focuses on driving mechanism (focus actuator) and the anti-unit that quivers (the first and second anti-actuators that quivers) is shown.

Figure 14 is the front elevation that the configuration that focuses on driving mechanism (focus actuator), the anti-unit that quivers (the first and second anti-actuators that quivers) and aperture unit (diaphragm actuator, shutter actuator and ND actuator) is shown.

Figure 15 is the block scheme that the circuit of picture pick-up device is shown.

Embodiment

Below, exemplary embodiment of the present invention is described with reference to the accompanying drawings.

Fig. 1 to Fig. 6 shows the structure as the lens barrel of the picture pick-up device of the optical device of an embodiment of the invention (digital still camera or video camera).Fig. 1 is the sectional view that is in the lens barrel of retracted position (reception position), and Fig. 2 is the last cut-open view that is in the lens barrel of retracted position.Fig. 3 is the sectional view that is in the lens barrel of WIDE position (camera positions), and Fig. 4 is the last cut-open view that is in the lens barrel of WIDE position.Fig. 5 is the sectional view that is in the lens barrel of TELE position (camera positions), and Fig. 6 is the last cut-open view that is in the lens barrel of TELE position.

In lens barrel, hold the optical system that constitutes by the first lens unit L1 that disposes in turn from object side, the second lens unit L2, the 3rd lens unit (as the correcting lens of the anti-lens that quiver) L3 and the 4th lens unit (as the condenser lens of moving lens) L4.Reference numeral AXL represents the optical axis of optical system.

Reference numeral 1 expression keeps first of the first lens unit L1.Cam pin 1a is installed to each position in three circumferential positions of edge on first 1 the inner peripheral surface, and the corresponding cam path 8a among three cam path 8a on each cam pin 1a and the outer peripheral face that is formed on cam canister 8 engages.Directly enter each position in three circumferential positions of edge on the inner peripheral surface that the groove (not shown) is formed on first 1 along what optical axis direction extended, and be formed on directly advancing the key (not shown) and directly advancing groove and engage on the outer peripheral face of stationary magazine creel 7.

Reference numeral 2 expressions keep second of the second lens unit L2.Cam pin 2a is installed to each position in three circumferential positions of edge on second 2 the outer peripheral face.Corresponding cam path 8b among three cam path 8b on each cam pin 2a and the inner peripheral surface that is formed on cam canister 8 engages.Cam pin 2a engages with the groove (not shown) that directly advances that is formed on the stationary magazine creel 7 in the mode of extending along optical axis direction.

Stationary magazine creel 7 is so that first 1 and second 2 mode of not rotating keeps first 1 and second 2.The cam pin (not shown) is installed to each position in three circumferential positions of edge on the outer peripheral face of stationary magazine creel 7, and the corresponding cam path 8e among three cam path 8e on each cam pin and the inner peripheral surface that is formed on cam canister 8 engages.

Reference numeral 5 expression aperture units.Fig. 7 and Fig. 8 represent the rear view and the front elevation of aperture unit 5 respectively.

The cam pin 5a that is arranged on the outer peripheral face of aperture unit 5 engages with cam path 8d on the inner peripheral surface that is formed on cam canister 8.Sleeve part 5b and rotational stop (not shown) are formed on the aperture unit 5, and sleeve part 5b and rotational stop engage with the

guide rod

21,22 that is supported by the imaging apparatus substrate 9 of second 2 and explanation after a while, so that sleeve part 5b and rotational stop can move along optical axis direction.

Reference numeral 51 expressions are carried out the diaphragm actuator of driven for opening and closing to the aperture blades (not shown) that is arranged in the aperture unit 5, and for example can use step motor.Reference numeral 52 expression is to being arranged on the shutter actuator that blade in the shutter (not shown) carries out driven for opening and closing.The ND actuator of Reference numeral 53 expression driving N D wave filter (not shown).

Aperture unit 5 (aperture blades), shutter (blade) and ND wave filter are that control is by arriving the fader control member of the light quantity of image planes (Shuo Ming imaging apparatus 11 after a while) after the optical system.Diaphragm actuator, shutter actuator and ND actuator are corresponding with the 4th actuator (fader control member actuator).

Reference numeral 3 expressions keep the 3rd retainer of correcting lens L3.Correcting lens L3 and the 3rd retainer 3 are parts of the anti-unit that quivers.Sensor retainer 32 by the anti-unit that quivers keeps the 3rd retainer 3 can make the 3rd retainer 3 along the mode that the direction (hereinafter being called the direction with the optical axis direction quadrature) with optical axis AXL quadrature is shifted.Reference numeral 31 expressions are with the coil retainer of the base portion of the anti-unit that quivers of sensor retainer 32 formations.

Cam pin 3a is set on the outer peripheral face of sensor retainer 32, and cam pin 3a engages with cam path 8c on the inner peripheral surface that is formed on cam canister 8.As Figure 11 and shown in Figure 12, sleeve part 3b and rotational stop 3c are formed on the sensor retainer 32.Each side among sleeve part 3b and the rotational stop 3c engages with the

guide rod

21 and 22 that is supported by second 2 and imaging apparatus substrate 9 respectively.

As mentioned above, by the guide rod 21 of second 2 support and 22 maintenance aperture units 5 and the anti-unit that quivers, make the aperture unit 5 and the unit of preventing quivering to move still and can not rotate along optical axis direction.

Reference numeral 4 expressions keep the 4th retainer of condenser lens L4, and as shown in Figure 9, the 4th retainer 4 has sleeve part 4a and rotational stop 4b.Sleeve part 4a and rotational stop 4b engage with the

guide rod

65 and 66 that is focused

base component

6 and 9 supports of imaging apparatus substrate respectively, so that sleeve part 4a and rotational stop 4b can move along optical axis direction.

The gear part (not shown) is formed on the inner peripheral surface of cam canister 8, and rotating force is passed to gear part from zoom motor (for example, step motor) (not shown) via gear row (geararray).Thereby cam canister 8 is rotated driving.When cam canister 8 rotates, Yi Bian cam canister 8 is by being formed on the cam path 8e in the cam canister 8 and being arranged on the joint between the cam pin on the stationary magazine creel 7 and rotating an edge optical axis direction and move.

First 1 by being arranged at first 1 cam pin 1a and being formed on the joint between the cam path 8a in the cam canister 8 and being formed on directly advancing groove and being arranged on directly advancing the joint between the key and do not move along optical axis direction rotationally on the stationary magazine creel 7 in first 1.In other words, the lens barrel in the present embodiment carries out the expanding-contracting action along optical axis direction.

Second 2 by be arranged on second 2 cam pin 2a be formed on cam canister 8 in cam path 8b and be formed on and directly advance engaging and do not move along optical axis direction rotationally between the groove in the stationary magazine creel 7.Carry out by first 1 and second 2 that moves along optical axis direction, the promptly first lens unit L1 and the second lens unit L2 and to become multiplying power.

The cam pin 5a of aperture unit 5 engages with cam path 8d in being formed on cam canister 8 and by

guide rod

21 and 22 5b of guide sleeve portion and rotational stop 5c, therefore, aperture unit 5 does not move along optical axis direction rotationally owing to be arranged at.

Cam pin 3a on the 3rd retainer 3 engages with cam path 8c in being formed on cam canister 8 and by

guide rod

21 and 22 3b of guide sleeve portion and rotational stop 3c, therefore, the 3rd retainer 3 does not move along optical axis direction rotationally owing to be arranged on.

Imaging apparatus 11 and IR-cut/low-pass filter 10 that 9 maintenances of imaging apparatus substrate are made of ccd sensor or cmos sensor.Utilize the screw (not shown) that stationary magazine creel 7 and focusing base component 6 are fixed on the imaging apparatus substrate 9.

Then, with reference to Fig. 9 and Figure 10 the focusing driving mechanism that drives the 4th retainer 4 is described, the 4th retainer 4 keeps condenser lens L4.Fig. 9 is the exploded perspective view that focuses on driving mechanism, and Figure 10 is the stereographic map that the part assembled state that focuses on driving mechanism is shown.

Air core coil 41 with rectangular cylinder shape is fixed on the 4th retainer 4.The hollow part of air core coil 41 is along the optical axis direction opening.Flexible base, board 42 is connected with air core coil 41.

Yoke 61,62 and magnet 63 are fixed on and focus on the base component 6.Yoke 61 has the U word shape and is arranged such that the top and bottom of yoke 61 extend along optical axis direction.Magnet 63 is maintained at the inside of yoke 61.Yoke 61 is inserted into the inside of air core coil 41.Air core coil 41 is disposed in apart from the distance of yoke 61 and magnet 63 predetermined spaces.

Magnet 63 extends along the optical axis direction as length direction, and is magnetized along the direction with the optical axis direction quadrature.Yoke 62 with H word shape is assembled into the openend of the U word shape of yoke 61.Constitute the linear actuators (voice coil motor) of the conduct focus actuator corresponding with the 3rd actuator by coil 41,

yoke

61 and 62, magnet 63.

When air core coil 41 was applied electric current, owing to the effect of the magnetic circuit that is formed by

yoke

61,62 and magnet 63, the 4th retainer 4 (being condenser lens L4) moved along optical axis direction, promptly moves along optical axis.

Be installed to the 4th retainer 4 along the scrambler magnet (encoder magnet) 43 that optical axis direction extends.Be fixed on the MR sensor (magnetoresistive transducer) 67 that focuses on the base component 6 and be disposed in the position relative with scrambler magnet 43 as magnetic sensor.Scrambler magnet 43 and the 4th retainer 4 move with change with respect to MR sensor 67 and act on the magnetic (magnetism) on the MR sensor 67 and change output from MR sensor 67.Change based on this output, CPU shown in Figure 15 (controller) 100 can detect the position of the 4th retainer 4.CPU 100 is with reference to controlling the electric current that is applied to air core coil 41 by the positional information of MR sensor 67 detected the 4th retainers 4, so that condenser lens L4 moves to target location (position in focus).

The structure of the anti-unit that quivers then, is described with reference to Figure 11 and Figure 12.Figure 11 is the exploded perspective view of the anti-unit that quivers, and Figure 12 is the stereographic map that the assembling completion status of the anti-unit that quivers is shown.

Magnet

33a and 33b are fixed on the 3rd retainer 3.Magnet 33a is arranged to parallel with the Y direction with orthogonal directions X respectively with 33b.Directions X and Y direction are the different directions from each other among the direction with the optical axis direction quadrature.

The 3rd retainer 3 keeps the 3rd retainer 3 by sensor retainer 32 via three volute springs 35, so that can be shifted along the direction with the optical axis direction quadrature.Volute spring 35 also has the 3rd retainer 3 is applied function towards the power of sensor retainer 32.Ball 36 is disposed in the planar portions (not shown) of three circumferential positions of the edge that is formed on the 3rd retainer 3 and is formed between the recess 3e of three circumferential positions of edge on the sensor retainer 32.The power that applies by volute spring 35 is clipped in ball 36 between planar portions and the recess 3e.Thereby the 3rd retainer 3 can not be shifted with respect to the state lower edge of inclined light shaft and the direction of optical axis direction quadrature.

Coil

34a and 34b are fixed on the position relative with 33b with above-mentioned magnet 33a in the coil retainer 31 respectively.Utilize the screw (not shown) that coil retainer 31 is fixed on the sensor retainer 32.

The 3rd retainer 3 is made of magnet 33a and coil 34a along the first anti-actuator that quivers of directions X displacement, the 3rd retainer 3 is made of magnet 33b and coil 34b along the second anti-actuator that quivers of Y direction displacement.The first and second anti-actuators that quiver are corresponding with first and second actuators respectively.

When electric current flows to coil 34a and 34b, drive the 3rd retainer 3 by being used between the magnetic of the magnetic that produces among coil 34a and the 34b and

magnet

33a and 33b, so that the 3rd retainer 3 is along directions X and the displacement of Y direction.

Reference numeral

37a and 37b represent the Hall element as magnetic sensor, and

Hall element

37a and 37b are maintained on the sensor retaining member 32.Hall element 37a is disposed in the position relative with 33b with magnet 33a to detect the required predetermined space of magnetic variationization (magnetic change) respectively with

37b.Magnet

33a and 33b and the 3rd retainer 3 have changed the magnetic that acts on Hall element 37a and the 37b with respect to

Hall element

37a and 37b move (displacement), and have changed the output from Hall element 37a and 37b.CPU 100 shown in Figure 15 can detect the position of the 3rd retainer 3 (correcting lens L3) based on the output from

Hall element

37a and 37b.

CPU 100 controls the electric current that is applied to

coil

34a and 34b based on the positional information of the 3rd retainer 3 that obtains from the output of vibration sensor 101 shown in Figure 15 and by

Hall element

37a and 37b, so that correcting lens L3 is displaced to the position that the image vibration reduces.Thereby, prevent the vibration work.

Then, with reference to Figure 13 the first and second anti-actuators and as the configuration of the voice coil motor of above-mentioned focus actuator of quivering are described.Figure 13 observes (observing along optical axis direction) figure when preventing quivering the unit when the direction from optical axis AXL.Suppose not carry out state that anti-vibration does, promptly suppose that the optical axis state consistent with the optical axis AXL of optical system that the 3rd retainer 3 (correcting lens L3) is disposed in neutral position and correcting lens L3 illustrates this embodiment.

In Figure 13, be defined as a-quadrant and B zone respectively with respect to upper-side area and the underside area of the straight line H that extends through the position of optical axis AXL and along left and right directions.In addition, be defined as B1 zone and B2 zone respectively with respect to left field and right side area through the position of the position of optical axis AXL and focus actuator and the straight line V that extends along the vertical direction.

Voice coil motor

41,61 and 63 is disposed in the a-quadrant.First anti-actuator 33a and 34a and second anti-actuator 33b and the 34b of quivering of quivering is disposed in respect in the optical axis AXL B zone opposite with the a-quadrant.

In this embodiment, statement " first anti-actuator and the second anti-actuator that quivers of quivering is disposed in the B zone " is not to only limit to first anti-quiver actuator and the second anti-actuator integral body of quivering to be included in situation in the B zone, but can comprise that the center O 1 of at least the first anti-the quiver actuator and the second anti-actuator that quivers and O2 are disposed in the situation in the B zone yet.In this case, even the top of the anti-actuator that quivers is projected in the a-quadrant a little, if center O 1 and O2 are arranged in the B zone, the then anti-actuator that quivers also is considered to be arranged in the B zone.This also is suitable for the situation that the top of the anti-actuator that quivers is projected in the a-quadrant a little owing to anti-vibration.

The center O separately 1 of the first and second anti-actuators that quiver and O2 need not to be and are positioned at more RCly, and the point that is positioned near the scope (central part) the center also is an acceptable.In addition, each center O 1 and O2 can be when the shape of the anti-actuator that quivers when optical axis direction is observed or the centre of gravity place of area, perhaps can be magnetic center or magnetic center of gravity.

The first and second anti-actuators that quiver are disposed in respectively in B1 zone and the B2 zone.Statement " the first and second anti-actuators that quiver are disposed in respectively in B1 zone and the B2 zone " comprises that the first and second anti-actuator integral body of quivering are included in the situation in B1 zone and the B2 zone respectively.Yet, can comprise that also center O 1 and O2 at least lay respectively at the situation in B1 zone and the B2 zone.

Thereby in the present embodiment, when when optical axis direction is observed, the first and second anti-actuators that quiver are disposed in respect in the optical axis AXL B zone opposite with the a-quadrant of layout focus actuator.In addition, the first and second anti-actuators that quiver are disposed in respectively with respect in optical axis AXL reciprocal B1 zone and the B2 zone.

When optical axis direction is observed, be positioned under the state of neutral position at the 3rd retainer 3, the focus actuator and first anti-distance L X and the focus actuator and second of quivering between the actuator prevent that the distance L Y that quivers between the actuator is equal to each other.Distance in this embodiment is position O3 and anti-quiver center (or central part) O1 of actuator and the distance between the O2 of focus actuator.

In other words, in the present embodiment, when when optical axis direction is observed, the first and second anti-actuators that quiver are disposed in about the position through the straight line V symmetry of the position O3 of the position of optical axis AXL and focus actuator.

In the present embodiment, when when optical axis direction is observed, focus actuator is disposed in apart from the position of optical axis first distance, and the first and second anti-actuators that quiver all are disposed in apart from the position of focus actuator second distance, and this second distance is than first distance.

When optical axis direction is observed, make the 3rd retainer 3 be disposed in the positions that phase place differs 90 degree each other along the first and second anti-actuators that quiver of orthogonal directions X and the displacement of Y direction respectively.Therefore, we can say, the first and second anti-actuators that quiver are arranged such that, connect center (or central part) O1 of the first anti-actuator that quivers and optical axis AXL the position straight line and connect center (or central part) O2 of the second anti-actuator that quivers and the straight line of the position of optical axis AXL is 45 with the angle between the straight line V and spends.

Distance L X and LY needn't be strictly consistent each other, and being considered to each other, the difference of the degree of the distance of unanimity also is acceptable.In addition, about the angle of symmetry or 45 degree, need not to be strict symmetry or 45 degree, the value that is positioned at the scope that is considered to identical with above-mentioned value basically also is an acceptable.

As mentioned above, if the first and second anti-actuators that quiver are disposed in the B zone (B1 zone and B2 zone), then distance L X and LY needn't be equal to each other or needn't be disposed in the position of above-mentioned symmetric position or 45 angles of spending.

The configuration of the aforesaid first and second anti-actuators that quiver can make first and second anti-quiver actuator the two away from location, focus actuator ground.As TOHKEMY 2003-295249 communique is disclosed, compare with the situation of two anti-actuators that quiver of configuration, though focus actuator and an anti-distance of quivering between the actuator are short slightly,, focus actuator and another anti-distance of quivering between the actuator can be extended significantly.Therefore, can alleviate focus actuator and two anti-magnetic interference of quivering between the actuator.In addition, can avoid from the magnetic leakage flux of two anti-actuators that quiver to the influence of MR sensor 67 or from the influence of the magnetic leakage flux of focus

actuator Hall element

37a and 37b.

Then, with reference to Figure 14 explanation when the focus actuator when optical axis direction is observed, the configuration relation between actuator, diaphragm actuator, shutter actuator and the ND actuator of preventing quivering.

In Figure 14, as mentioned above, Reference numeral 51 expression diaphragm actuators, Reference numeral 52a represents to constitute the magnet of shutter actuator 52.Reference numeral 53a represents to constitute the magnet of ND actuator 53.

When optical axis direction is observed, diaphragm actuator 51, shutter actuator 52 and ND actuator 53 are not disposed in and the focus actuator and the first and second anti-actuator overlapping areas of quivering.In shutter actuator 52 and ND actuator 53, magnet 52a and 53a are subjected to the influence of the magnetic force of other actuator.Therefore, statement " when when optical axis direction is observed; shutter actuator 52 and ND actuator 53 are not disposed in and the focus actuator and the first and second anti-actuator overlapping areas of quivering " means: when when optical axis direction is observed, magnet 52a and 53a are not disposed in and prevent quivering the actuator overlapping areas with focus actuator and first and second.

In addition, in the present embodiment, all focus actuator, first and second anti-quiver actuator, diaphragm actuator 51, shutter actuator 52 and the ND actuators 53 all are disposed in the inside as the stationary magazine creel 7 of the barrel member with drum.

More specifically, when when optical axis direction is observed, diaphragm actuator 51 is disposed in the focus actuator and first anti-the quivering between the actuator.Shutter actuator 52 is disposed in first and second anti-the quivering between the actuator.In addition, ND actuator 53 is disposed in the focus actuator and second anti-the quivering between the actuator.

In order to obtain the big moving range of condenser lens L4, focus actuator comprises yoke 61 and the magnet of growing along the length of optical axis direction 63.Therefore, when when optical axis direction is observed, diaphragm actuator 51 is arranged to not overlapping with focus actuator, thereby with space-efficient configuration diaphragm actuator 51.

In the structure of the first and second anti-actuators that quiver in the present embodiment, emit most of magnetic force of the magnet of each anti-actuator that quivers along optical axis direction.Therefore, when when optical axis direction is observed, shutter actuator 52 and ND actuator 53 are arranged to not overlapping with the first and second anti-actuators that quiver, with the influence that not interfered by magnetic.

In the present embodiment, magnetic shield panel 64 is disposed on two sides of focus actuator, to reduce the magnetic leakage flux from focus actuator.Thereby combination is anti-quivers actuator with respect to the configuration of above-mentioned focus actuator, and the magnetic that can reduce between these actuators is interfered.

In addition, in the present embodiment, focus actuator is long on optical axis direction.Therefore, focus actuator be arranged to common positive position use focus actuator under the situation of picture pick-up device be positioned in lens barrel above, make can not produce ghost image or flash of light by the light that is reflected on the focus actuator.In this case, two anti-actuators that quiver are positioned in the below of lens barrel.

The structure of the circuit of the CPU 100 that Figure 15 has all illustrated above showing and comprising, vibration sensor 101, first and second anti-quiver actuator X and Y,

Hall element

37a and 37b, focus actuator and MR sensors 67.Vibration sensor 101 is made of angular-rate sensor, acceleration transducer etc. and comes output signal according to the vibration of picture pick-up device.CPU 100 amplifies the signal that comes self-vibrating sensor 101 and this signal is carried out integration tremble displacement signal to produce, thereby calculates the target location that the 3rd retainer 3 (correcting lens L3) is displaced to based on this vibration displacement signal.

CPU 100 depend on the target location of calculating with by from the input of

Hall element

37a and 37b to the difference of position of the 3rd retainer 3 to the coil 34a and the 34b supplying electric current of the first and second anti-actuators that quiver.Thereby CPU 100 carries out the FEEDBACK CONTROL of the first and second anti-actuators that quiver, so that correcting lens L3 is displaced to the target location.

As mentioned above, according to above-mentioned embodiment, when when optical axis direction is observed, focus actuator, first and second anti-quiver actuator, diaphragm actuator, shutter actuator and the ND actuators are arranged to not overlap each other.Therefore, the magnetic that can alleviate between these actuators is interfered.In addition, because all these actuators all are disposed in the inside of stationary magazine creel (barrel member), therefore, can make the lens barrel miniaturization.In addition, the lens barrel that also can realize comprising these actuators and can carry out expanding-contracting action.

According to above-mentioned embodiment,, therefore, can alleviate the first and second anti-magnetic that quiver between actuator and the focus actuator and interfere because that the first and second anti-actuators that quiver are arranged to from focus actuator is enough far away.When magnetic sensor is used to detect the position of condenser lens or correcting lens, can reduce first and second anti-quiver activate or focus actuator to the magnetic influence of magnetic sensor.

As mentioned above, according to present embodiment, when when optical axis direction is observed, first to fourth all actuators all is arranged to not overlap each other.Therefore, the magnetic that can alleviate between first to fourth actuator is interfered.In addition,, therefore, can make the lens barrel miniaturization because first to fourth all actuators all is disposed in the inside of barrel member, in addition, the lens barrel that also can realize comprising first to fourth actuator and can carry out expanding-contracting action.

For example, in the above-described embodiment, diaphragm actuator is disposed in the focus actuator and first anti-the quivering between the actuator, and shutter actuator is disposed in first and second anti-the quivering between the actuator.In addition, the ND actuator is disposed in the focus actuator and second anti-the quivering between the actuator.Yet the configuration relation of diaphragm actuator, shutter actuator and ND actuator also can be changed each other.

The situation of the diaphragm actuator, shutter actuator and these three actuators of ND actuator that comprise as the 4th actuator has been described in the above-described embodiment.Yet, the invention is not restricted to comprise the situation of all these three actuators, but also applicable to one or two being set, being the situation of at least one the 4th actuator.

In addition, the configuration relation of the actuator in the above-mentioned embodiment only is an example.In other words, when when optical axis direction is observed, diaphragm actuator, shutter actuator and ND actuator only need to be arranged to not overlapping with the focus actuator and the first and second anti-actuators that quiver, and this focus actuator and the first and second anti-actuators that quiver are arranged to not overlap each other.

In the above-described embodiment, illustrated that magnetic sensor is used to detect the situation of the position of correcting lens or condenser lens, still, replaced this situation, also can use optical sensor.

In the above-described embodiment, picture pick-up device has been described, still, the present invention is also applicable to interchangeable lens (optical device).

Though the present invention has been described with reference to exemplary embodiment,, should be appreciated that, the invention is not restricted to disclosed exemplary embodiment.The scope of appended claims will meet the wideest explanation, to comprise all modification, equivalent structure and function.

Claims

1. optical device, this optical device comprises:

The anti-lens that quiver, its can with respect to the optical axis of optical system with the direction superior displacement of described light shaft positive cross;

Moving lens, it can move along described optical axis;

The fader control member, it is configured to control the light quantity by described optical system;

First actuator and second actuator, each side in this first actuator and second actuator includes magnet and coil, this first actuator and second actuator be constructed such that described anti-quiver lens with the different directions from each other superior displacement of described light shaft positive cross;

The 3rd actuator, it comprises magnet and coil and is constructed such that described moving lens moves;

The 4th actuator, it is configured to operate described fader control member; And

Barrel member, it holds described anti-quiver lens, described moving lens, described fader control member and described first to fourth actuator,

Wherein, when when optical axis direction is observed, described first to fourth actuator is disposed in the inside of described barrel member in the mode that does not overlap each other.

2. optical device according to claim 1 is characterized in that,

When described optical axis direction is observed, described the 4th actuator is disposed between described first actuator and described second actuator.

3. optical device according to claim 1 and 2 is characterized in that,

Described first actuator and described second actuator are arranged in respect to described optical axis and arrange the regional opposite zone of described the 3rd actuator, and described first actuator and described second actuator are arranged in respect to the reciprocal zone of described optical axis.

4. optical device according to claim 1 and 2 is characterized in that,

When described optical axis direction is observed, be positioned under the state of neutral position at the described anti-lens that quiver, the distance between distance between described first actuator and described the 3rd actuator and described second actuator and described the 3rd actuator is equal to each other.

5. optical device according to claim 1 and 2 is characterized in that,

When described optical axis direction is observed, described the 3rd actuator is disposed in the position apart from described optical axis first distance, the two all is disposed in the position of described the 3rd actuator second distance of distance described first actuator and described second actuator, and described second distance is than described first distance.

6. optical device according to claim 1 and 2 is characterized in that,

When described optical axis direction is observed, described first actuator and described second actuator are disposed in about the position through the straight line symmetry of the position of described optical axis and described the 3rd actuator.

7. optical device according to claim 1 and 2 is characterized in that,

When described optical axis direction is observed, the described magnet and the described coil that constitute each side in described first actuator and described second actuator are arranged to overlap each other.

8. optical device according to claim 1 and 2 is characterized in that,

Described barrel member is to constitute the member that carries out the lens barrel of expanding-contracting action along described optical axis direction.